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Page Title:
Table 1-1. Repair and Replacement Standards |
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 TM 10-3930-621-34
Table 1-1. Repair and Replacement Standards
Manufacturer's
Maximum
dimensions and
allowable
tolerances in
Desired
wear and
Component
inches
clearance
clearance
Minimum Maximum
Minimum Maximum
ENGINE:
Cylinder bore ..............................................
3.2503
3.2507
...................................
0.0004
Main bearing journal bore ...........................
2.2810
2.2815
...................................
0.0005
Camshaft bushing bore:
Front ........................................................
2.2535
2.2545
...................................
0.0010
Center......................................................
2.0035
2.0045
...................................
0.0010
Rear.........................................................
1.6285
1.6295
...................................
0.0010
Crankshaft end play .......................................
0.0045
0.0085
Connecting rod bearing:
Running clearance......................................
0.0005
0.0030
0.0025
Journal diameter .........................................
1.749
1.750
...................................
0.001
Journal undersize diameters ......................
1.739
1.740
...................................
0.001
1.729
1.730
...................................
0.001
Main bearing:
Running clearance......................................
0.0005
0.0030
0.0025
Journal diameter .........................................
2.124
2.125
...................................
0.001
Journal undersize diameters ......................
2.114
2.115
...................................
0.001
2.104
2.105
...................................
0.001
Piston pin:
Diameter .....................................................
0.8743
0.8744
...................................
0.0001
Length.........................................................
2.697
2.701
...................................
0.004
Clearance
................................
0.0002
0.0006
0.0004
Piston:
Top land:
Diameter ..................................................
3.225
3.229
...................................
0.004
Clearance
................................
0.021
0.025.......
0.004
2nd, 3rd and 4 th lands:
Diameter ..................................................
3.231
3.235
...................................
0.004
Clearance
................................
0.015
0.019
0.004
Pin hole bore...............................................
0.8746
0.8747
...................................
0.0001
Skirt diameter .............................................
3.2485
3.2505
...................................
0.0020
Skirt clearance
..................................
0.0018
0.0037
0.0019
Groove width:
1st land ....................................................
0.095
0.096
...................................
0.001
2nd, 3rd lands..........................................
0.094
0.095
...................................
0.001
4th land....................................................
0.187
0.189
...................................
0.002
Piston rings:
Top, 2nd, 3rd ring gap ................................
0.010
0.020
...................................
0.010
4th ring rail gap ...........................................
0.015
0.055
...................................
0.040
1-3
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